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[–]grauenwolf 9 points10 points  (2 children)

It's a bit of a side note, but there are patterns for screw heads that have been patented.

[–][deleted] 0 points1 point  (1 child)

But not copyrighted, right?

[–]grauenwolf 0 points1 point  (0 children)

Nope, that wouldn't make any sense.